Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session KI02: Low Temperature Plasmas
3:00 PM–5:00 PM,
Tuesday, October 18, 2022
Room: Ballroom 100 B
Chair: Yevgeny Raitses, PPPL
Abstract: KI02.00004 : Diagnostics of plasma-liquids systems: challenges and their mitigation*
4:30 PM–5:00 PM
Presenter:
Shurik Yatom
(PPPL, Princeton)
Author:
Shurik Yatom
(PPPL, Princeton)
At this talk I will briefly review the different diagnostics methods for characterization of low-temperature plasma and plasma induced species. I will describe the caveats that are encountered when measuring inherently unstable systems, such as plasma interacting with liquid. Specific example is the correlation of plasma channel dynamics and Thomson scattering measurements. Thomson scattering (TS) technique emerges as popular in the low-temperature plasma community. Thomson scattering is advantageous as its a direct measurement of plasma density and temperature and is routinely used to study low-temperature plasma sources. The TS method has an intrinsic superiority to alternative emission spectroscopy, which constitutes its immediate non-disturbing, widely used optical approach. The detection threshold for TS is lower and it measures electron temperature directly, while analysis of emission lines is related to excitation temperature. In many plasmas TS scattering is the sole possible method capable of plasma characterization. Therefore, the identification of the TS shortcomings is necessary as are approaches to mediate them.
*This work is supported by the Princeton Collaborative Research Facility (PCRF), which is supported by the U.S. Department of Energy (DOE) under Contract No. DE-AC02-09CH11466.
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